Παραπομπή APA

Lockwood A. (2001). Tourism and hospitality in the 21st century.

Παραπομπή Chicago Style

Lockwood A. Tourism and Hospitality in the 21st Century. Routledge,London, 2001.

Παραπομπή MLA

Lockwood A. Tourism and Hospitality in the 21st Century. 2001.